.1v^2+v-300=0

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Solution for .1v^2+v-300=0 equation:


Simplifying
0.1v2 + v + -300 = 0

Reorder the terms:
-300 + v + 0.1v2 = 0

Solving
-300 + v + 0.1v2 = 0

Solving for variable 'v'.

Begin completing the square.  Divide all terms by
0.1 the coefficient of the squared term: 

Divide each side by '0.1'.
-3000 + 10v + v2 = 0

Move the constant term to the right:

Add '3000' to each side of the equation.
-3000 + 10v + 3000 + v2 = 0 + 3000

Reorder the terms:
-3000 + 3000 + 10v + v2 = 0 + 3000

Combine like terms: -3000 + 3000 = 0
0 + 10v + v2 = 0 + 3000
10v + v2 = 0 + 3000

Combine like terms: 0 + 3000 = 3000
10v + v2 = 3000

The v term is v.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
10v + 0.25 + v2 = 3000 + 0.25

Reorder the terms:
0.25 + 10v + v2 = 3000 + 0.25

Combine like terms: 3000 + 0.25 = 3000.25
0.25 + 10v + v2 = 3000.25

Factor a perfect square on the left side:
(v + 0.5)(v + 0.5) = 3000.25

Calculate the square root of the right side: 54.77453788

Break this problem into two subproblems by setting 
(v + 0.5) equal to 54.77453788 and -54.77453788.

Subproblem 1

v + 0.5 = 54.77453788 Simplifying v + 0.5 = 54.77453788 Reorder the terms: 0.5 + v = 54.77453788 Solving 0.5 + v = 54.77453788 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + v = 54.77453788 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + v = 54.77453788 + -0.5 v = 54.77453788 + -0.5 Combine like terms: 54.77453788 + -0.5 = 54.27453788 v = 54.27453788 Simplifying v = 54.27453788

Subproblem 2

v + 0.5 = -54.77453788 Simplifying v + 0.5 = -54.77453788 Reorder the terms: 0.5 + v = -54.77453788 Solving 0.5 + v = -54.77453788 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + v = -54.77453788 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + v = -54.77453788 + -0.5 v = -54.77453788 + -0.5 Combine like terms: -54.77453788 + -0.5 = -55.27453788 v = -55.27453788 Simplifying v = -55.27453788

Solution

The solution to the problem is based on the solutions from the subproblems. v = {54.27453788, -55.27453788}

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